论文部分内容阅读
目的将混凝土损伤塑性模型应用于钢管混凝土柱弹塑性全过程受力分析,验证模型的可行性.方法在总结相关文献的基础上,选取钢材和混凝土的本构关系模型,定义混凝土损伤塑性因子,以及混凝土压缩复原和拉伸恢复系数,对方钢管混凝土短柱进行有限元模拟,并与试验结果进行对比.结果考虑混凝土损伤塑性模型的极限承载力数值模拟结果与试验结果更接近,荷载-平均纵向应变数值模拟曲线与试验曲线吻合更好,柱中部破坏面的混凝土应力分布更均匀.说明在钢管混凝土结构有限元模拟中考虑混凝土损伤塑性是提高其分析精度的重要保证.结论数值模拟结果与试验结果一致性较好,说明有限元模型和相关参数设置是合理的.
Aim To apply the plasticity model of concrete damage to the whole process of elasto-plastic analysis of CFST columns to verify the feasibility of the model.Methods Based on the related literatures, the constitutive model of steel and concrete was selected to define the damage plasticity factor of concrete, As well as the coefficient of compressive recovery and tensile recovery of concrete, the concrete filled steel tubular short columns were simulated by finite element method and compared with the experimental results.Results The numerical results of the ultimate bearing capacity of plastic damage plastic model are close to the experimental results, and the load-average longitudinal Strain numerical simulation curve is in good agreement with the experimental curve, and the stress distribution of the concrete in the center of the column is more uniform, which shows that considering the damage plasticity of concrete in the finite element simulation of CFST structure is an important guarantee to improve its analytical accuracy.CONCLUSIONS Numerical simulation results and tests The consistency of the results is good, indicating that the finite element model and related parameter settings are reasonable.